From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 586CEC38A2F for ; Sat, 18 Apr 2020 14:43:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 389DC21D82 for ; Sat, 18 Apr 2020 14:43:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587221009; bh=Nc7RsPd8Y5ByX3ptQZ5fohyeTqewNhMV0zhtHF5N9OI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=aSA6sA3L8Ra/3Nj07xnZhIa9PH4A9lWOpu9Rp6D7VUebyyE9FzEmZk+m0xZ57Xdg2 eiAMU/u4HWpZ6E+bVNEdvQZKjETQ+E6Eccf0c9VWRAMAKtH+sXEjBmZnd2g1NR1E4u vYbHStVX/EnnfQfSNPENGlHHbPHXDKdeKk/5JKrk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728588AbgDROn2 (ORCPT ); Sat, 18 Apr 2020 10:43:28 -0400 Received: from mail.kernel.org ([198.145.29.99]:54232 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728544AbgDROnS (ORCPT ); Sat, 18 Apr 2020 10:43:18 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1BEF222240; Sat, 18 Apr 2020 14:43:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587220998; bh=Nc7RsPd8Y5ByX3ptQZ5fohyeTqewNhMV0zhtHF5N9OI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Bsfs9HqKlO+WIobS/8KO0AoKauBJ4kCFOQNQYVFN+IKDJ16oirLZo5akWodQ8dXT/ 37gWBikKIaA0vvSwty2xeOdGWedCHtXRytndSxWtvyOvcP1AaSlwvUWzf9BmmvXTON 5y6AL51YY58Ifi4/uff7DPueXia5BNnDWXQTSO0w= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Yongqiang Sun , Tony Cheng , Rodrigo Siqueira , Alex Deucher , Sasha Levin , amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 4.19 40/47] drm/amd/display: Not doing optimize bandwidth if flip pending. Date: Sat, 18 Apr 2020 10:42:20 -0400 Message-Id: <20200418144227.9802-40-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200418144227.9802-1-sashal@kernel.org> References: <20200418144227.9802-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Yongqiang Sun [ Upstream commit 9941b8129030c9202aaf39114477a0e58c0d6ffc ] [Why] In some scenario like 1366x768 VSR enabled connected with a 4K monitor and playing 4K video in clone mode, underflow will be observed due to decrease dppclk when previouse surface scan isn't finished [How] In this use case, surface flip is switching between 4K and 1366x768, 1366x768 needs smaller dppclk, and when decrease the clk and previous surface scan is for 4K and scan isn't done, underflow will happen. Not doing optimize bandwidth in case of flip pending. Signed-off-by: Yongqiang Sun Reviewed-by: Tony Cheng Acked-by: Rodrigo Siqueira Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/dc/core/dc.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index 2b2efe443c36d..b64ad9e1f0c38 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -996,6 +996,26 @@ bool dc_commit_state(struct dc *dc, struct dc_state *context) return (result == DC_OK); } +static bool is_flip_pending_in_pipes(struct dc *dc, struct dc_state *context) +{ + int i; + struct pipe_ctx *pipe; + + for (i = 0; i < MAX_PIPES; i++) { + pipe = &context->res_ctx.pipe_ctx[i]; + + if (!pipe->plane_state) + continue; + + /* Must set to false to start with, due to OR in update function */ + pipe->plane_state->status.is_flip_pending = false; + dc->hwss.update_pending_status(pipe); + if (pipe->plane_state->status.is_flip_pending) + return true; + } + return false; +} + bool dc_post_update_surfaces_to_stream(struct dc *dc) { int i; @@ -1003,6 +1023,9 @@ bool dc_post_update_surfaces_to_stream(struct dc *dc) post_surface_trace(dc); + if (is_flip_pending_in_pipes(dc, context)) + return true; + for (i = 0; i < dc->res_pool->pipe_count; i++) if (context->res_ctx.pipe_ctx[i].stream == NULL || context->res_ctx.pipe_ctx[i].plane_state == NULL) { -- 2.20.1